CN100363081C

CN100363081C - On-line back flushing sand filter

Info

Publication number: CN100363081C
Application number: CNB200410053680XA
Authority: CN
Inventors: 马立峰
Original assignee: DEAN NEW-TECHNOLOGY DEVELOPMENT Co Ltd ZHEJIANG
Current assignee: Zhejiang Dean Technology Co., Ltd.
Priority date: 2004-08-12
Filing date: 2004-08-12
Publication date: 2008-01-23
Anticipated expiration: 2024-08-12
Also published as: CN1586700A

Abstract

The present invention relates to an on-line back flushing sand filter which comprises a barrel body, a water inlet positioned at the upper part of the barrel body, a sewage draining outlet and a water outlet positioned at the lower part of the sewage draining outlet, wherein the middle part of the barrel body is provided with a filtering material layer, and a water collection cavity is formed in the barrel body under the filtering material layer. The on-line back flushing sand filter is characterized in that the middle part of the barrel body is also provided with a plurality of partition plates which divide the filtering material layer into a plurality of independent sector radiation shape filtering areas, the upper ends of the partition plates are flatly provided with baffle plates whose inner diameter is matched with the inner diameter of the barrel body, and the baffle plates are provided with a plurality of through holes corresponding to each filtering area. The inside of the barrel body on the baffle plates is provided with a hollow connecting arm, the lower end of the hollow connecting arm is connected with the through holes, the upper end of the hollow connecting arm is communicated with the sewage draining outlet, the connecting arm is also arranged on a rotating disk, and the outside of the barrel body is provided with a driver which drives the rotating disk. After the structure is adopted, back flushing can be carried out to one of the filtering areas one by one under the state of keeping the continuous filtration of other filtering areas, so that the on-line back flushing sand filter has high work efficiency of the sand filter, simple structure, small volume, large back flushing pressure, good flushing effect and easy generalization and application.

Description

A kind of online backflushing washed-out sand filter

Technical field

The present invention relates to a kind of sand filter, especially refer to have in a kind of water treatment technology the pressure type sand filter of backwashing function.

Background technology

Often use sand filter in the general water treatment technology, during filtration, water flows through filter material layer equably by water-locator, gets the back by the collect cavity collection of filter material layer below and flows out water purification from delivery port.In use, because filter material layer is constantly held back the impurity in the water, therefore after moving a period of time, the impurity of being on the increase can stop up the filtration channel in the filter material layer and cause the increase of delivery turbidity or the rising of the loss of flood peak, so sand filter generally all has back purge system, make after operation a period of time, in time filter material layer is carried out backwash, to keep the normal water purification function of sand filter.As the Chinese invention patent application number is a kind of sand filter 02158719.1 " pressure type sand filter and back-washing method " just disclosed, it comprises cylindrical shell, be positioned at the water inlet on cylindrical shell top, the delivery port of sewage draining exit and cylindrical shell bottom, filter material layer is positioned at the middle part of cylindrical shell, the filter material layer below is a collecting chamber, its back purge system comprises air pump and places the interior air bag of collecting chamber, be provided with two pipelines between air pump and the cylindrical shell, article one, be arranged on the filtrate middle part of cylindrical shell filter material layer by the air purge import on the cylindrical shell, the air bag in another connected set hydroecium.When backwash, close raw water pump earlier, open the air purge import, make the filter material layer rapid expanding, open the valve of air bag air inlet again, make air pressure promptly be full of air bag, eject the back flush filtrate behind the water pressurized in the collecting chamber at this moment, discharge from sewage draining exit at last.Therefore, adopt the sand filter of said structure, reuse again after filter material layer can being cleaned up as required at any time, thus prolong its service life.But when carrying out, owing to need turn off raw water pump in advance, promptly need to stop to implement backwash after the normal filtration function of sand filter oppositely towards Xian, obviously this can influence the normal filtration work of sand filter, reduce its operating efficiency, even influence demand of practical production, simultaneously this flusher complex structure, when flushing, be subjected to the influence of gasbag pressure, weak effect is wasted time and energy, therefore the sand filter of said structure still has unsatisfactory part in the use, need await further improvement.

Summary of the invention

Technical problem to be solved by this invention is the defective that overcomes prior art, provides a kind of filtration and backwash is carried out simultaneously, the online backflushing washed-out sand filter of high efficiency.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this online backflushing washed-out sand filter comprises cylindrical shell, be positioned at the water inlet on cylindrical shell top, sewage draining exit and the delivery port that is positioned at its underpart, in the middle part of described cylindrical shell, be provided with in filter material layer and the cylindrical shell under filter material layer and form collect cavity, it is characterized in that: also be provided with a plurality of demarcation strips that filter material layer are separated into a plurality of independent fan beam shape filtering areas at the middle part of this cylindrical shell, this demarcation strip upper end keeps flat the dividing plate that matches with cylinder internal diameter, have on this dividing plate and the corresponding a plurality of through holes of each filtering area, and be provided with the lower end in the cylindrical shell on dividing plate and can connect with through hole, the hollow linking arm that the upper end communicates with sewage draining exit, this linking arm is arranged on again on the rotating disk, and outside described cylindrical shell, be equipped with drive this rotating disk driver, described each through hole serve as evenly distribution with one heart with this disk axes then.

Described fan beam shape filtering area is evenly to be distributed as.

Can be provided with the soil pick-up cover that sealing covers through hole on the described linking arm lower surface.

Described filter material layer middle part can be axially arranged with a support column, and above-mentioned each demarcation strip is on the side that radial distribution is fixed on this support column, to make things convenient for the fixing of demarcation strip successively.

Also can be fixed with the transition conduit of hollow on the described sewage draining exit, described rotating disk is also supported by hollow and by the bearing that is positioned at transition conduit, and described linking arm is connected with transition conduit by the rotating disk of this hollow.

Described driver can be made up of motor, decelerator and power transmission shaft, and described power transmission shaft links with described rotating disk after running through transition conduit; Wherein said decelerator can be gear-box, also can be worm gear and worm screw.

Described turning cylinder can also on the index dial of being convenient to control the motor rotational angle is installed.

Compared with prior art, the invention has the advantages that: after adopting said structure, when the needs backwash, only need by the driver arm that is rotationally connected, link up the drainage channel of corresponding filtering area and sewage draining exit, utilize self pressure of pipe network to make the water purification in the collect cavity carry out backwash again to this filtering area, promptly under the state that keeps other filtering area continuous filtration operation, one by one a filtering area is wherein carried out backwash, in the filter capacity of recovering filtrate, do not stop the normal operation of sand filter again, therefore improved the operating efficiency of sand filter widely, and simple in structure, volume is little, and backwashing pressure is big, developing result is good, so the present invention is worth applying in this area.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 be among Fig. 1 A-A to profile;

Fig. 3 for the B-B among Fig. 1 to cutaway view (after removing filter material layer).

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 1 to Figure 3, this sand filter comprises the cylindrical shell of being made up of upper and lower end socket and middle cylinder 12, the water inlet 22 that on upper cover, is provided with, sewage draining exit and exhaust outlet 7, and low head is provided with delivery port 17, in cylinder, be provided with the filter material layer 14 that is positioned on the support captation 15, form collect cavity 16 in the cylindrical shell under filter material layer 14, and whole cylindrical shell 12 is supported by the supporting leg 18 of below.In order to realize backwashing function, be axially arranged with a support column 19 at the middle part of filter material layer 14, be fixed with the demarcation strip 13 of a plurality of radial arrangement successively in the side of support column 19, this demarcation strip 13 is separated into above-mentioned filter material layer 14 filtering area of a plurality of independent fan beam shapes, in the present embodiment, this demarcation strip is 12, filter material layer 14 is separated into 12 uniform filtering areas, and keep flat the dividing plate 10 that matches with cylinder 12 internal diameters in demarcation strip 13 upper ends, have on this dividing plate 10 and the corresponding a plurality of through holes 23 of each filtering area, and being provided with the lower end in the cylindrical shell on dividing plate 10 can connect with through hole 23, the hollow linking arm 9 that the upper end communicates with sewage draining exit, this linking arm 9 is arranged on again on the rotating disk 21, and outside described cylindrical shell 12, be equipped with drive this rotating disk 21 driver.

For linking arm 9 lower ends are docked apace with through hole 23, each through hole 23 serves as evenly to distribute with one heart with rotating disk 21 axle center, and is provided with the soil pick-up cover 11 of salable covering through hole 23 on linking arm 9 lower surfaces.

Consider being connected of linking arm 9 upper ends and sewage draining exit simultaneously, on sewage draining exit, be fixed with the transition conduit 5 of hollow, the outer end of this screen pipe 5 is provided with seal cover 4, it is exposed on the sidewall outside the cylindrical shell 12 and is connected with blow-off pipe 6, and the place, end that is positioned within the cylindrical shell is provided with bearing 8, described rotating disk 21 hollows and its upper end are by these bearing 8 supportings, and described linking arm 9 upper ends then are connected with blow-off pipe 6 by rotating disk 21, transition conduit 5 backs of hollow.

Above-mentioned driver is made up of motor 1, decelerator 2 and power transmission shaft 20, this power transmission shaft 20 runs through seal cover 4, transition conduit 5 and rotating disk 21 backs and fixes with described rotating disk 21 lower surfaces, the rotation of motor 1 like this, after the transmission by decelerator 2 and power transmission shaft 20, rotating disk 21 is rotated, finally drive the rotation of linking arm 9.

In the present embodiment, in order to control the rotational angle of motor 1, so that linking arm 9 docks the index dial 3 that is equipped with exactly on above-mentioned power transmission shaft 20 with through hole 23.Can certainly adopt other gauge tap, as near switch, travel switch or microswitch come docking of control connection arm lower end and through hole.

When normal use, water enters from water inlet 22, and through entering in the corresponding filtering area behind the through hole 23 on the dividing plate 10, the water purification after filter material layer 14 purifies is by the branch water cap on the support captation 15 respectively, flow in the collect cavity 16, flow out from delivery port 17 at last.After using a period of time, when the filtrate passage in each filtering area is stopped up by impurity, or need regularly clean by technological requirement the time, send signal by differential pressure pickup or timer, motor 1 is rotated, and rotating disk 21 is rotated by decelerator 2 and power transmission shaft 20, driving linking arm 9 rotates, rotational angle through index dial 3 control motors, the lower end of linking arm 9 is just connected with through hole 23, at this moment, linking arm 9 communicates with the filtering area that is blocked, and links up the drainage channel of filtering area and sewage draining exit, under the effect of pipe network self pressure, water purification in the collect cavity 16 is successively by the branch water cap on the support captation 15, this filtering area, linking arm 9, rotating disk 21, transition conduit 5 flows out from blow-off pipe 6, carries the impurity that comes off simultaneously and flow out from blow-off pipe 6 in filtering area.This filtering area is after backwash a period of time, and motor 1 turns to next filtering area again, carries out identical backwash operation.When this filtering area carried out backwash, other filtering area was still worked normally like this, can clean other 11 filtering areas successively by this, when one takes turns the backwashing procedures end, sand filter recovers original running status again, when the needs backwash, and the work that goes round and begins again again.

Claims

1. online backflushing washed-out sand filter, it comprises cylindrical shell (12), be positioned at the water inlet (22) on cylindrical shell top, sewage draining exit and the delivery port (17) that is positioned at its underpart, in the middle part of described cylindrical shell, be provided with and form collect cavity (16) in filter material layer (14) and the cylindrical shell under filter material layer, it is characterized in that: also be provided with a plurality of demarcation strips (13) that filter material layer are separated into a plurality of independent fan beam shape filtering areas at the middle part of this cylindrical shell, this demarcation strip (13) upper end keeps flat the dividing plate (10) that matches with cylinder internal diameter, have on this dividing plate and the corresponding a plurality of through holes of each filtering area (23), and be provided with the lower end in the cylindrical shell on dividing plate and can connect with through hole (23), the hollow linking arm (9) that the upper end communicates with sewage draining exit, this linking arm is arranged on again on the rotating disk (21), and the driver that drives this rotating disk is installed outside described cylindrical shell (12), described each through hole (23) serves as evenly to distribute with one heart with this rotating disk (21) axle center then.

2. online backflushing washed-out sand filter according to claim 1 is characterized in that described fan beam shape filtering area is for evenly distributing.

3. online backflushing washed-out sand filter according to claim 1 is characterized in that described linking arm (9) lower surface is provided with the soil pick-up cover (11) of salable covering through hole (23).

4. according to the described online backflushing washed-out sand of the arbitrary claim of claim 1 to 3 filter, it is characterized in that described filter material layer (14) middle part is axially arranged with a support column (19), above-mentioned each demarcation strip (13) is on the side that radial distribution is fixed on this support column (19) successively.

5. according to the described online backflushing washed-out sand of the arbitrary claim of claim 1 to 3 filter, it is characterized in that being fixed with on the described sewage draining exit transition conduit (5) of hollow, described rotating disk (21) is also supported by hollow and by the bearing that is positioned at transition conduit (5) (8), and described linking arm (9) is connected with transition conduit (5) by the rotating disk (21) of this hollow.

6. online backflushing washed-out sand filter according to claim 5 is characterized in that described driver is made up of motor (1), decelerator (2) and power transmission shaft (20), and described power transmission shaft (20) runs through transition conduit (5) back and links with described rotating disk (21).

7. online backflushing washed-out sand filter according to claim 6 is characterized in that being equipped with on the described power transmission shaft (20) index dial (3) of being convenient to control motor (1) rotational angle.